The SCHA211217AB from Sangshin is a RF & Microwave Circulator with Frequency 2110 to 2170 MHz, Average Power Forward 175 W, Insertion Loss 0.18 to 0.22 dB, Isolation 22 to 26 dB, Return Loss 22 to 26 dB. Tags: Drop-in Circulator. More details for SCHA211217AB can be seen below.